CN100486552C

CN100486552C - Pull-on disposable wearing article

Info

Publication number: CN100486552C
Application number: CNB2003801095865A
Authority: CN
Inventors: 釰持泰彦; 岛田孝明; 鱼泽贵子; 大坪俊文
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2003-01-10
Filing date: 2003-12-26
Publication date: 2009-05-13
Anticipated expiration: 2023-12-26
Also published as: BR0317355B1; CA2512604A1; EP1584311A4; US7588561B2; CA2512604C; EP1584311A1; TW200412909A; WO2004062542A1; JP2004216082A; MY135848A; TWI232746B; CN1744869A; US20050075618A1; BR0317355A; KR100656774B1; KR20050099966A; AU2003292704B2; AU2003292704A1

Abstract

A pull-on disposable wearing article is formed in a crotch region with a pair of first folding guide lines extending from a first waist lateral margin toward a transverse middle of the crotch region and a pair of second folding guide lines extending from a second waist lateral margin toward the transverse middle of the crotch region. The crotch region is divided into a first zone enclosed by the first waist lateral margin and the first folding guide lines, a second zone enclosed by the second waist lateral margin and the second folding guide lines and a third zone except these first and second zones. Inside the side edges of the core, first and second elastic members stretched at a predetermined ratio are contractibly attached to the article. These first and second elastic members extend in the leg-surrounding direction across these zones to the third zone. These zones are pulled inward as viewed in a leg-surrounding direction under a contractile force of the elastic members to form tucks which are convex inwardly of the leg-holes.

Description

The pull-on type disposable wearing article

Technical field

The present invention relates to a kind of pull-on type disposable wearing article, the Excreta that is used to absorb and take in health.

Background technology

Known a kind of pull-on type disposable wearing article that discloses in Japanese Patent Application Publication document No.2002-35033A, it has front waist region respect to one another and rear waist region, the crotch area that extends, a waist hole and a pair of leg hole between these lumbar regions.This goods comprise liquid lamella, liquid-tight lamella and are plugged between these lamellas and extend in whole crotch and enter the imbibition core body of front waist region and rear waist region.Crotch area be formed with a plurality of towards each leg hole to projecting inward seam pleat.

Said products have by front waist region and rear waist region limit and transversely extend around the upper end-face edge of waist, also limits by front waist region and rear waist region and the waist side edge that extends along the longitudinal and a pair ofly limits and along the lateral edges that centers on shank around the direction extension of shank by crotch area.The waist side edge that will lie in together by many tack lines of arranging off and on along the longitudinal is connected with each other.This goods are formed with a pair of at the laterally relative folding leading line around extension between the lateral edges of shank and the intersection of the lateral mid-point place in crotch area.Therefore, crotch area is divided into first area and second area and the 3rd zone except that first area and second area that is surrounded by transverse edge and these folding leading lines around shank respectively.First area and second area are folding along folding leading line separately between the first half in the 3rd zone and latter half, so that form a pair of seam pleat that protrudes towards the inside of leg hole separately.Compare with the state before first area and second area is inwardly folding,, can reduce the lateral dimension of crotch area effectively by will be folding at the first half in the 3rd zone and these zones between the latter half.

But such problem is accompanied by said products, that is, the seam pleat launches along folding leading line when goods wearer's shank is guided through the leg hole of goods, and the lateral dimension of crotch area is got back in formation the size before these stitch pleats.Therefore, lateral dimension becomes sometimes greater than wearer's crotch area, and can not suitably be contained in wearer's the crotch area.Core body becomes than being expected more fluffyly by its predetermined thickness and hardness, and makes the wearer produce sense of discomfort.In addition, the core body that is placed in the crotch is folded brokenly, and perhaps core body is formed with a plurality of irregular wrinkle, and makes the excremental degradation of absorbing bodily except crotch area, thereby the body excretions that makes any amount is from the crotch area side leakage.

Summary of the invention

An object of the present invention is to provide a kind of pull-on type disposable wearing article, it allows crotch area to be formed with stable seam pleat, and can by mistake not launch, it can reduce the lateral dimension of crotch area again, thereby crotch area can closely be contained in goods wearer's the crotch area.

According to the invention provides a kind of pull-on type disposable wearing article, it has front waist region respect to one another and rear waist region, the crotch area that between these lumbar regions, extends, the upper end-face edge that limits and transversely extend by front waist region and rear waist region around waist, the horizontal relative waist side edge that limits with rear waist region and extend along the longitudinal by front waist region, wherein, the waist side edge of front waist region and rear waist region is connected and forms a waist hole and a pair of leg hole, and have by crotch area and limit and along first and second the lateral edges that extend around the direction of lower limb around shank, be placed in the crotch area or be placed on front waist region, imbibition core body in rear waist region and the crotch area, wherein leg elastic member centers on the lateral edges extension of shank and is connected to described first and second along described first and second and centers on the lateral edges of shank, to form the shape of general toroidal.

These goods are characterised in that, further comprise following feature:

Crotch area is formed with a pair of first folding leading line and a pair of second folding leading line, this first folding leading line extends towards the horizontal mid portion of crotch area from described first two points that center on the lateral edges of shank, described two points are placed on one side towards front waist region and rear waist region respectively, this second folding leading line is from extending towards the horizontal mid portion of crotch area at second two points that center on the lateral edges of shank, two points are placed on one side towards described front waist region and rear waist region respectively, thereby crotch area is divided into the first area, second area and the 3rd zone except first area and second area, the first area is surrounded by described first the lateral edges and the first folding leading line around shank, so that the horizontal mid portion towards crotch area little by little diminishes, second area is surrounded by second the lateral edges and the second folding leading line around shank, so that little by little diminish towards the horizontal mid portion of crotch area;

First elastic component that extends to the 3rd zone along the direction around shank across the first area is connected on the goods collapsiblely, be positioned at first the inboard of lateral edges of core body on the side of the lateral edges of shank, second elastic component that extends to the 3rd zone along the direction around shank across second area is connected on the goods collapsiblely, be positioned at second the inboard of lateral edges of core body on the side of the lateral edges of shank, described first elastic component and second elastic component are different from described elastic component around shank; And

Under the effect of the contractility of first elastic component, the first area is moving along being pulled inward when the direction of shank is seen, to form the seam pleat that protrudes towards the inboard of described leg hole, and under the effect of the contractility of second elastic component, second area is moving along being pulled inward when the direction of shank is seen, to form the seam pleat that protrudes towards the inboard of leg hole.

When the present invention includes the length of tensile first and second elastic components of following predetermined ratio, first and second elastic components have the shrinkage factor in the scope of 25-70%.

First and second elastic components have the tensile stress in the scope of 0.1-3.0N.

The hardness of core body in first area and second area is less than the hardness in the 3rd zone.

In first area and second area, there is not core body.

These goods comprise in the face of the saturating liquid lamella of wearer's body, deviate from the liquid-tight lamella of wearer's body and the core body between these lamellas planted.

Brief description of drawings

Fig. 1 is the perspective view that shows according to first embodiment of pull-on type disposable wearing article of the present invention;

Fig. 2 be show goods shown in Figure 1 on contractility ground that pleat plays zone opposing elastic component the outside perspective view during expansion;

Fig. 3 shows that goods shown in Figure 1 are at front waist region and the rear waist region expansion plane graph of the part excision under the connection status not each other;

Fig. 4 is the sectional view along Fig. 1 center line IV-IV intercepting;

Fig. 5 is the perspective view that shows according to second embodiment of wearing article of the present invention;

Fig. 6 be show goods shown in Figure 5 on contractility ground that pleat plays zone opposing elastic component the outside perspective view during expansion;

Fig. 7 is the expansion plane graph that shows the part excision of goods shown in Figure 5 under front waist region and the unconnected each other state of rear waist region; And

Fig. 8 is the sectional view along Fig. 5 center line VIII-VIII intercepting.

The specific embodiment

From the description that the present invention is provided below with reference to accompanying drawing, can understand details in further detail according to pull-on type disposable wearing article of the present invention.

Fig. 1 is the perspective view that shows according to the wearing article 1A of one embodiment of the invention, Fig. 2 is that the goods 1A of displayed map 1 is stitching pleat 26,27 opposing elastic components 24, perspective view when 25 contractility ground outwards launches, Fig. 3 shows the local expansion plane graph of goods 1A shown in Figure 1 under the unconnected each other situation in waist side edge 10 that cuts away, and Fig. 4 is the sectional view along Fig. 1 center line IV-IV intercepting.In Fig. 1-3, arrow L represents that laterally arrow M represents vertically, and arrow N represents the direction (only in Fig. 1 and Fig. 2) around shank.Fig. 3 has shown that goods 1A is transversely and the state during longitudinal stretching." inner surface " of the top flat layer 2 of Shi Yonging, middle sheet 3 and backsheet layer 5 statement herein is meant the surface in the face of core body 4 in these lamellas, and " outer surface " of these

lamellas

2,3,5 that herein use statement is meant the surface that deviates from core body 4 in these lamellas.

Goods 1A comprises liquid top flat layer 2 (saturating liquid lamella), middle sheet 3, is plugged on these lamellas 2, imbibition core body 4 between 3, be placed on the liquid-tight backsheet layer 5 (liquid-tight lamella) and the elastic component separately 16,17,18 in middle sheet 3 outsides, 24,25.Top flat layer 2 is faced wearer's health, and is plugged with core body 4 and middle sheet 3, and backsheet layer 5 deviates from wearer's health.Goods 1A has the crotch area 7 of front waist region 6 respect to one another and rear waist region 8 and extension between these lumbar regions 6,8.Core body 4 extends on whole crotch area 7, and further extends in front waist region 6 and the rear waist region 8, so that occupied the horizontal zone line in these front waist region 6 and the rear waist region 8.

Goods 1A has: around the top edge 9 of waist, its appropriate section of transversely being extended outside the longitudinal relative end 4a of core body 4 by front waist region 6 and rear waist region 8 is limited; Horizontal relative waist side edge 10, its appropriate section of being extended along the longitudinal outside the horizontal opposed side edge 4b of core body by front waist region 6 and rear waist region 8 is limited; First and second

lateral edges

11,12 around shank, it is limited along the appropriate section of extending around the direction of shank outside the horizontal opposed side edge 4b of core body 4 by crotch area 7.First and second when presenting along laterally the seeing of goods around the

lateral edges

11,12 of shank to projecting inward circular arc.Therefore, goods 1A presents the flat shape of hourglass shape substantially.

By many tack lines 13 arranged off and on along the longitudinal that waist side edge 10 is overlapping and link together.Goods 1A is formed with waist hole 14 and a pair of leg hole 15 that is centered on by first and second

lateral edges

11,12 that center on shank respectively that is centered on by the top edge 9 around waist.

Transversely the banded waist elastic members 16 of Yan Shening is connected on the top edge 9 of waist collapsiblely.A plurality of leg

elastic member

17,18 are connected first and second on the

lateral edges

11,12 of shank respectively collapsiblely, so that extend along the direction around shank.

Shown in Fig. 2 and 3, crotch area 7 is formed with a pair of first folding leading line 19 and a pair of second folding leading line 20, this first folding leading line 19 is transversely from first two some P1 that center on the lateral edges 11 of shank, P2 extends towards the horizontal zone line 7a of crotch area 7, described two some P1, P2 is placed on a side towards front waist region 6 and rear waist region 8 respectively, this second folding leading line 20 is transversely from second two some P3 that center on the lateral edges 12 of shank, P4 extends towards the horizontal zone line 7a of crotch area 7, described two some P3, P4 is arranged on a side towards front waist region 6 and rear waist region 8 respectively.The first folding leading line 19 is rendered as the V-arrangement that broadens gradually towards first lateral edges 11 that centers on shank from the zone line 7a of crotch area 7 substantially, and the second folding leading line 20 is substantially the V-arrangement that broadens gradually towards second lateral edges 12 that centers on shank from the zone line 7a of crotch area 7.

Crotch area 7 is divided into by first around first area 21 that the lateral edges 11 of shank and the first folding leading line 19 are surrounded, by second second area 22 that is surrounded around the lateral edges 12 and the second folding leading line 20 of shank and except the 3rd zone 23 outside first and second zones 21,22.First area 21 has and is substantially the triangle that narrows down gradually towards the zone line 7a of crotch area 7 around the lateral edges 11 of shank from first.Similarly, second area 22 presents the triangle that narrows down gradually towards the zone line 7a of crotch area 7 from second lateral edges 12 that centers on shank substantially.The hardness of core body 4 in first area and

second area

21 and 22 is less than the hardness in the 3rd zone 23.

Be connected on these goods collapsiblely, be positioned at tensile first elastic component 24 of predetermined ratio and be adjacent to first the inboard of lateral edges 4b of core body 4 on the side of the lateral edges 11 of shank.When laterally seeing, first elastic component 24 is set at the inboard of leg

elastic member

17,18, and strides across first area 21 along the direction around shank and extend to the 3rd zone 23.With identical method, be connected on these goods collapsiblely, be positioned at tensile second elastic component 25 of predetermined ratio and be adjacent to second the inboard of lateral edges 4b of core body 4 on the side of the lateral edges 12 of shank.When laterally seeing, second elastic component 25 is set at the inboard of leg

elastic member

17,18, and strides across second area 22 along the direction around shank and extend to the 3rd zone 23.First and second

elastic components

24,25 are plugged between top flat layer 2 and the core body 4, and connect thereon.

In crotch area 7, under the effect of the contractility of first elastic component 24, first area 21 is moving along being pulled inward when the direction of shank is seen, and under the effect of the contractility of second elastic component 25, second area 22 is moving along being pulled inward when the direction of shank is seen, thereby crotch area 7 is folded along the first and second folding leading lines 19,20.Therefore, in crotch area 7, first area 21 forms the seam pleat 26 that protrudes towards the inboard of leg hole 15, and second area 22 forms the seam pleat 27 that protrudes towards the inboard of leg hole 15.First area 21 and second area 22 is pleating between the first half in the 3rd zone 23 and latter half.In first area 21, its first half 21a and latter half 21b contact with each other, and simultaneously backsheet layer 5 part of extending in these first halfs 21a of first area 21 and latter half 21b has the outer surface separately that contacts with each other.In second area 22, its first half 22a and latter half 22b contact with each other, and simultaneously backsheet layer 5 part of extending in these first halfs 22a of second area 22 and latter half 22b has the outer surface separately that contacts with each other.In first area and

second area

21 and 22, be each defined in the imaginary the 3rd folding leading line 28 that transversely extends between first half 21a and the latter half 21b and between first half 22a and latter half 22b.Also can suppose such alternative scheme, wherein, under the effect of the contractility of first and second

elastic components

24,25, these

zones

21,22 along moving from being pulled inward when the shank direction is seen, thus, with these

zones

21,22 inboard pleating towards separately leg hole 15, do not fold leading line 28 and in these first and

second zones

21,22, form the 3rd.

Based on the length of these

elastic components

24,25 that have been stretched by predetermined ratio with 100 representatives, first and second

elastic components

24,25 have the shrinkage factor in the scope of 25-70%, and have the tensile stress in the scope of 0.1-3.0N.Shrinkage factor is calculated by following formula:

{(A-B)/A}×100

Wherein, represent the length of the

elastic component

24,25 that is stretched according to predetermined ratio as A, and B represents the length of these

elastic components

24,25 after shrinking.

The elastic component 24 after if the shrinkage factor of

elastic component

24,25 less than 25%, is then shunk from extended state, 25 are not enough to sometimes along inwardly spur first and second zones 21 when the direction that centers on shank is seen, 22, in crotch area 7, to form seam pleat 26,27.If the tensile stress of

elastic component

24,25 is less than 0.1N, then

elastic component

24,25 contractility is not enough to keep seam pleat 26,27 sometimes, thereby when on the health that goods 1A is through the wearer, seam pleat 26,27 may easily launch along the first and second folding leading lines 19,20.Therefore, crotch area 7 can be got back to it and form seam pleat 26,27 original state before.

Top flat layer 2 and middle sheet 3 have the flat shape of the essentially rectangular that extends on front waist region 6, crotch area 7 and rear waist region 8.These

lamellas

2,3 have the outward extending longitudinal relative end edge 2a of portion outside the longitudinal relative end 4a of core body 4 respectively, 3a and outside the horizontal opposite side edge 4b of core body 4 outward extending horizontal opposite side edge 2b, 3b.With the inner surface of these

lamellas

2,3 along these

end edge

2a, 3a and these

lateral edges

2b, 3b is overlapping and link together.In front waist region 6 and rear waist region 8, the lateral edges 2b of these

lamellas

2,3,3b is folded inwards on the upper surface of core body 4 when laterally seeing, and the lateral edges 2b of lamella 2 is connected on its end edge 2a.Middle sheet 3 is connected its outer surface on the inner surface of backsheet layer 5.Core body 4 is connected on the inner surface separately of top flat layer 2 and middle sheet 3.

Top flat layer 5 comprises two hydrophobic fibre

non-woven fabric lamellas

29,30 that overlap together each other.The surface area of backsheet layer 5 has bigger than the surface area of top flat layer 2 and middle sheet 3, and is substantially the flat shape of hourglass shape.Upper end-face edge 9 and waist side edge 10 around waist are formed by backsheet layer 5, and center on the lateral edges 2b of the

lateral edges

11,12 of shank by

lamella

2,3, and 3b and backsheet layer 5 form.

Waist elastic members 16 is plugged between the

non-woven fabric layer

29,30 that constitutes backsheet layer 5, and is bonded on these non-woven fabric layers 29,30.Leg

elastic member

17,18 comprises elastic component 17 that is connected on the backsheet layer 5 and the elastic component 18 that is connected on top flat layer 2 and the middle sheet 3.Elastic component 17 is plugged in the

non-woven fabric layer

29,30, and is bonded on these non-woven fabric layers 23,30.Elastic component 18 is plugged between top flat layer 2 and the middle sheet 3, and is bonded in its lateral edges 2b, on the inner surface separately of 3b.These

elastic components

17,18 extend along the

lateral edges

11,12 around shank, are substantially annular shape to be deformed into.

Core body 4 comprises mixture of being made up of fine hair slurry and superabsorbent polymer particles or the mixture of being made up of fine hair slurry, superabsorbent polymer particles and thermoplasticity synthetic resin fiber, and no matter under any circumstance, it all is compressed into required thickness.Therefore, the hardness of core body 4 is higher than the hardness of top flat layer 2, middle sheet 3 and backsheet layer 5.Preferably, core body 4 breaks away from its original shape and/or prevents the polymer particles abscission to prevent core body 4 fully by the saturating liquid lamella parcel such as tissue paper or hydrophilic fibre non-woven fabric.

In order to regulate the hardness of core body 4 in first area 21 and second area 22 less than the hardness in the 3rd zone 23, core body 4 can be adjusted to less than basic weight or density in the 3rd zone 23 at basic weight in first and

second zones

21,22 or density.

Goods 1A is so constituted, promptly, in crotch area 7, first and

second zones

21,22 form the seam pleat 26,27 that protrudes towards the inboard of leg hole 15, therefore, the situation that does not form this seam pleat 26,27 with crotch area 7 is compared (see figure 2), can more easily reduce the lateral dimension of crotch area 7.The contractility of first and second

elastic components

24,25 makes seam pleat 26,27 stable reliably, even and when leg hole 15 was passed in wearer's shank guiding, these

seam pleats

26,27 also can not by mistake be launched.

In the time of on the health that goods 1A is through the wearer, crotch area 7 suitably is contained in wearer's the crotch area, and therefore, crotch area 7 can not become too fluffy and make the wearer that sense of discomfort be arranged.In addition, even what need not to worry is when being extruded between the crotch area of crotch area 7 the wearer, the core body 4 in the crotch area 7 can be by folding and/or be formed with a plurality of irregular folds brokenly.Therefore, kept the excremental function of absorbing bodily in the crotch area 7 reliably, and body excretions can not side leakage from crotch area 7.

As shown in Figure 3, in goods 1A, preferred in 30-120 ° scope at the angle θ 2 of angle θ 1 that limits between the first folding leading line 19 and qualification between the second folding leading line 20.If these angles θ 1 and θ 2 are less than 30 °, then first and

second zones

21,22 can unacceptably narrow down, and make it can not form enough greatly seam pleat with the lateral dimension that reduces crotch area 7.If these angles θ 1, θ 2 is greater than 120 °, and then the first folding leading line 21 and the second folding leading line 22 all can not arrive waist side edge 10, and first and second

elastic components

24,25 contractility can not be with first and

second zones

21,22 along inwardly spurring when the direction of shank is seen.Therefore, can not in crotch area 7, form seam pleat 26,27.

First and

second zones

21,22 form the seam pleat 26,27 that protrudes towards the inboard of leg hole 15 respectively, thereby these

zones

21,22 are raise towards waist hole 14, as shown in Figure 4.These of Sheng Gaoing first and

second zones

21,22 form the baffle element to body excretions by this way, and the body excretions that prevents any amount reliably is from 21,22 side leakages of first and second zones.The lateral dimension of the crotch area 7 that reduces can not produce adverse influence to the excremental function of the absorbing bodily in the crotch area 7, because the part in first and

second zones

21,22 of being positioned at of core body 4 absorbs effectively and keeps body excretions.

Elastic component 18 is along inwardly shrinking when the direction of shank is seen, and resisting the contractility of

elastic component

24,25 and when launching when seam pleat 26,27, makes the lateral edges 2b of

lamella

2,3, and 3b raises on core body 4.Even when seam pleat 26,27 is unfolded, the lateral edges 2b that on core body 4, raises of these

lamellas

2,3,3b forms the baffle element to body excretions, and prevents to take place around crotch area 7 leakage of body excretions thus.

Fig. 5 is the perspective view that shows according to the wearing article 1B of second embodiment of the present invention, Fig. 6 shows when seam pleat 26,27 are resisting

elastic component

24,25 contractility and the perspective view of goods 1B shown in Figure 5 when outwards launching, Fig. 7 shows goods 1B shown in Figure 5 waist side edge 10 unconnected each other expansion plane graphs when part is cut away, and Fig. 8 is the cross sectional view of the line VIII-VIII intercepting in Fig. 5.In Fig. 5-7, arrow L represents that laterally arrow M represents that vertically arrow N represents the direction (only in Fig. 5 and 6) around shank.Fig. 7 has shown that goods 1B is transversely and the state during longitudinal stretching.

Goods 1B comprises liquid top flat layer 2 (saturating liquid lamella), liquid-tight backsheet layer 5 (liquid-tight lamella), is plugged on imbibition core body 4 and elastic component separately 16,17,18,24,25 between these lamellas 2,5.Top flat layer 2 is in the face of wearer's health, and the core body 4 of planting, and backsheet layer 5 deviates from wearer's health.Goods 1B has the crotch area 7 of front waist region 6 respect to one another and rear waist region 8 and extension between these lumbar regions 6,8.Core body 4 extends on whole crotch area 7, and further extends in front waist region 6 and the rear waist region 8, so that occupy the horizontal zone line in these front waist region 6 and rear waist region 8.

Goods 1B has: the top edge 9 around waist that transversely extends; The horizontal relative waist side edge 10 of Yan Shening along the longitudinal; Along first and second the

lateral edges

11,12 that extend around the direction of shank around shank.During from laterally the seeing of goods 1B, first and second

lateral edges

11,12 around shank present to projecting inward circular arc.By many tack lines 13 that are provided with off and on along the longitudinal, that waist side edge 10 is overlapping and link together.Goods 1B is formed with a waist hole 14 and a pair of leg hole 15.

elastic member

17,18 are connected first and second on the

lateral edges

As shown in Figure 6, crotch area 7 is formed with a pair of first folding leading line 19 and a pair of second folding leading line 20, this first folding leading line 19 is transversely from first two some P1 that center on the lateral edges 11 of shank, extend towards the horizontal zone line 7a of crotch area 7 at the P2 place, described two some P1, P2 is arranged on a side towards front waist region 6 and rear waist region 8 respectively, and this second folding leading line 20 is transversely from second two some P3 that center on the lateral edges 12 of shank, P4 extends towards the horizontal zone line 7a of crotch area 7, described two some P3, P4 is arranged on a side towards front waist region 6 and rear waist region 8.

Crotch area 7 is divided into by first around first area 21 that the lateral edges 11 of shank and the first folding leading line 19 surround, by second second area 22 that surrounds around the lateral edges 12 and the second folding leading line 20 of shank and except the 3rd zone 23 outside first and second zones 21,22.First area 21 is substantially the triangle that diminishes gradually towards the zone line 7a of crotch area from first lateral edges 11 that centers on shank.Similarly, second area 22 is substantially the triangle that diminishes gradually from second the zone line 7a around the lateral edges 12 of shank towards crotch area.In first area and

second area

21,22, there is not core body 4.

Be connected on these goods collapsiblely, be positioned at tensile first elastic component 24 of predetermined ratio and be adjacent to first the inboard of lateral edges 4b of core body 4 on the side of the lateral edges 11 of shank.When laterally seeing, first elastic component 24 is placed on the inboard of leg elastic member 18, and strides across first area 21 along direction and extend to the 3rd zone 23 around shank.In an identical manner, be connected on these goods collapsiblely, be positioned at next-door neighbour nation in second the inboard of lateral edges 4b of core body 4 on the side of the lateral edges 12 of shank with tensile second elastic component 25 of predetermined ratio.When laterally seeing, second elastic component 25 is placed on the inboard of leg elastic member 18, and strides across second area 22 along the direction around shank and extend to the 3rd zone 23.First and second

elastic components

24,25 are plugged between top flat layer 2 and the backsheet layer 5, and are bonded on the inner surface of these

lamellas

2,5.

second area

21 and 22, the imaginary the 3rd folding leading line 28 that transversely extends is each defined between first half 21a and the latter half 21b and between first half 22a and latter half 22b.Also can suppose an alternative scheme, wherein, at first and second elastic components 24, under the effect of 25 contractility, first and

second zones

21,22 are when along from being pulled inward when seeing moving around the shank direction, thus with these

zones

21,22 inboard pleating towards separately leg hole 15, and in these first and

second zones

21,22, do not form the 3rd folding leading line 28.

Based on 100 expressions during by the length of tensile these

elastic components

24,25 of predetermined ratio, first and second

elastic components

24,25 have with embodiment shown in Figure 1 in identical shrinkage factor and tensile stress.

Top flat layer 2 has the flat shape of the general rectangular of extending on whole crotch area 7, and further extends in front waist region 6 and the rear waist region 8.Top flat layer 2 has outward extending vertically relative end edge 2a outside the vertical relative end 4a of core body 4 respectively, and outside the horizontal opposed side edge 4b of core body 4 outward extending horizontal opposed side edge 2b.The inner surface of top flat layer 2 and backsheet layer 5 square is bonded together together and along these end edge 2a and lateral edges 2b.Core body 4 is similar with the core body in the embodiment shown in Figure 1, and is connected on the inner surface separately of top flat layer 2 and backsheet layer 5.

Backsheet layer 5 comprises the

non-woven fabric layer

29,30 and the ventilative and liquid-impervious plastic films 31 that is plugged between these non-woven fabric layers 29,30 of two hydrophobic fibres that laminate mutually.The surface area of backsheet layer 5 is greater than the surface area of top flat layer 2, and is substantially the flat shape of hourglass shape.Thin film 31 also has orthogonal substantially flat shape, and identical substantially with the shape and size of top flat layer 2, and is positioned under the core body 4.In backsheet layer 5,

non-woven fabric layer

29,30 is overlapped and linked together, and thin film 31 is connected on these non-woven fabric layers 29,30.Forms by backsheet layer 5 around the upper end-face edge 9 and the waist side edge 10 of waist, and the lateral edges 11,12 that centers on shank is formed by the lateral edges 2b and the backsheet layer 5 of top flat layer 2.

Waist elastic members 16 is plugged in the

non-woven fabric layer

elastic member

17,18 comprises elastic component 17 that is connected on the backsheet layer 5 and the elastic component 18 that is connected on the top flat layer 2.Elastic component 17 is plugged in the

non-woven fabric layer

29,30, and is attached on these non-woven fabric layers 29,30.Elastic component 18 is connected on the lateral edges 2b of top flat layer 2, thereby can makes the part parcel of these elastic components 18 by top flat layer 2.

Goods 1B is so constituted, that is, in crotch area 7, first and

second zones

21,22 form the

seam pleat

26,27 that protrudes towards the inboard of leg hole 15, therefore, have correspondingly reduced the lateral dimension of crotch area 7.The contractility of first and second

elastic components

24,25 makes

seam pleat

26,27 stable reliably, even and when leg hole 15 was passed in wearer's shank guiding, these seam pleats 26,27 also can not by mistake be launched.

When on the health that goods 1B is through the wearer, crotch area 7 suitably is contained in wearer's the crotch area, and therefore, crotch area 7 can not become too fluffy and make the wearer that sense of discomfort be arranged.In addition, what need not to worry is even that when being extruded between the crotch area of crotch area 7 the wearer, the core body 4 in the crotch area 7 can be folded and/or be formed with a plurality of irregular folds brokenly.Therefore, kept excremental function of absorbing bodily and the body excretions in the crotch area 7 can not side leakage from crotch area 7 reliably.In goods 1B, preferred in 30 °-120 ° scope, as shown in Figure 6 at the angle θ 2 of angle θ 1 that limits between the first folding leading line 19 and qualification between the second folding leading line 20.

First and

second zones

21,22 form the

seam pleat

26,27 that protrudes towards the inboard of leg hole 15, and raise towards waist hole 14, as shown in Figure 8.The baffle element that these

zones

21,22 that raise by this way form body excretions, and prevent that thus body excretions from leaking around crotch area 7.

The raw material that is used for top flat layer 2 can be selected from hydrophilic fibre non-woven fabric, the plastic sheeting that has the hydrophobic fibre non-woven fabric in a plurality of holes and have a plurality of pores.The raw material that is used for middle sheet 3 can be selected from hydrophilic fibre non-woven fabric, hydrophobic fibre non-woven fabric and ventilative and liquid-impervious plastic films.As the raw material of middle sheet 3 and backsheet layer 5, can also use the compound non-woven fabric at least one side that comprises meltblown fibers non-woven fabric and be laminated on this meltblown fibers non-woven fabric with high strength and elastomeric spun-bonded fibre non-woven fabric with high water proofing property.

Being used for non-woven fabric of the present invention can be from selecting by those fabrics of spun laced process, needle point method, meltblown, hot sticky method, spun-bond process, chemical bonding manufactured.The component fibre of non-woven fabric can be from by based on selecting the core-skin type of the fiber of polyolefin-based, polyester-based and polyamide-based and polyethylene/polypropylene or polyethylene/polyester or the conjugate fibre of type constitutes side by side the one group of material.

The raw material that is used for backsheet layer 5 can select can stretch ventilative and liquid-tight plastic foil and comprising of the non-woven fabric of the stretchable hydrophobic fibre of elasticity, elasticity to be layered in can the stretch compact layer of the stretchable hydrophobic fibre non-woven fabric of elasticity on ventilative and the liquid-impervious plastic films of elasticity.As backsheet layer, can use the compound non-woven fabric of the hydrophobic fibre non-woven fabric that comprises that crimped fibre that the thermoplasticity synthetic resin that passes through fusion-jetting polypropylene, polyethylene or polyester on stretchable hydrophobic fibre non-woven fabric of elasticity that the thermoplastic elastomer resin fiber is made and at least one side that is layered in this hydrophobic fibre non-woven fabric obtains is made.

By using hot-melt adhesive or bonding technology such as heat-sealing or ultrasonic sealing technology,

lamella

2,3,5 can be connected to each other together, core body 4 is engaged with

lamella

2,3,5, and

elastic component

16,17,18,24,25 and

lamella

2,3,5 are linked together.

The principal character of pull-on type disposable wearing article of the present invention is, in crotch area, first area and second area form the seam pleat that protrudes towards the inboard of leg hole, therefore with crotch area in do not form this seam pleat situation compare, can reduce the lateral dimension of crotch area.In these goods, the contractility of first and second elastic components makes these seam pleats stable reliably, even and when leg hole was passed in wearer's lower limb guiding, these seam pleats also can not by mistake be launched.

When on the health that these goods is through the wearer, crotch area suitably is contained in wearer's the crotch area, thereby crotch area can not become too fluffy and make the wearer that sense of discomfort be arranged.In addition, what need not to worry is that even crotch area is extruded in wearer's crotch area, the core body in the crotch area can be folded and/or be formed with a plurality of irregular wrinkle brokenly.Therefore, kept the excremental function of absorbing bodily in the crotch area reliably, and body excretions can not be from the crotch area side leakage.

In the embodiment of the hardness of core body in first area and second area less than the hardness goods in the 3rd zone, the contractility of first and second elastic components is enough big, being convenient in crotch area, form the seam pleat thus to the pulling first area, inboard and the second area of leg hole.

In first area and second area, do not have in the embodiment of goods of core body, the contraction power of first and second elastic components can spur first area and second area smoothly to the inboard of leg hole, and can not be subjected to the influence of core body hardness, therefore be easy in crotch area, form the seam pleat.

Claims

1. pull-on type disposable wearing article, it comprises:

Front waist region respect to one another and rear waist region and the crotch area that between described two lumbar regions, extends;

By described front waist region and rear waist region limits and along horizontal expansion around the upper end-face edge of waist;

Horizontal relative waist side edge, it is limited and is extended longitudinally by described front waist region and rear waist region, thus the described waist side edge of described front waist region and rear waist region is connected to form a waist hole and a pair of leg hole;

Limit and center on the lateral edges of shank along first and second of the direction extension that centers on shank by described crotch area;

The imbibition core body, it is placed in the described crotch area, perhaps be placed in described front waist region, described rear waist region and the described crotch area, wherein leg elastic member centers on the lateral edges extension of shank and is connected to described first and second along described first and second and centers on the lateral edges of shank, to form the shape of general toroidal; Described goods are characterised in that:

Described crotch area is formed with a pair of first folding leading line and a pair of second folding leading line, this first folding leading line extends towards the horizontal mid portion of described crotch area from described first two points that center on the lateral edges of shank, described two points are placed on one side towards described front waist region and rear waist region respectively, this second folding leading line is from extending towards the described horizontal mid portion of described crotch area at described second two points that center on the lateral edges of shank, described two points are placed on one side towards described front waist region and rear waist region respectively, thereby described crotch area is divided into the first area, second area and the 3rd zone except described first area and second area, described first area is surrounded by described first the lateral edges and the described first folding leading line around shank, so that the described horizontal mid portion towards described crotch area little by little diminishes, described second area is surrounded by described second the lateral edges and the described second folding leading line around shank, so that little by little diminish towards the described horizontal mid portion of described crotch area;

First elastic component that extends to described the 3rd zone along the direction around shank across described first area is connected on the goods collapsiblely, be positioned at described first the inboard of lateral edges of described core body on the side of the lateral edges of shank, second elastic component that extends to described the 3rd zone along the direction around shank across described second area is connected on the goods collapsiblely, be positioned at described second the inboard of lateral edges of described core body on the side of the lateral edges of shank, described first elastic component and second elastic component are different from described leg elastic member; And

Under the effect of the contractility of described first elastic component, described first area is moving along being pulled inward when the direction of shank is seen, to form the seam pleat that protrudes towards the inboard of described leg hole, and under the effect of the contractility of described second elastic component, described second area is moving along being pulled inward when the direction of shank is seen, to form the seam pleat that protrudes towards the inboard of described leg hole.

2. wearing article as claimed in claim 1 is characterized in that, based on the length of described first and second elastic components that have been stretched with predetermined ratio with 100 representatives, described first and second elastic components have the shrinkage factor in the scope of 25-70%.

3. wearing article as claimed in claim 1 or 2 is characterized in that, described first and second elastic components have the tensile stress in the scope of 0.1-3.0N.

4. as each described wearing article in the claim 1 to 3, it is characterized in that the hardness of described core body in described first area and second area is less than the hardness in described the 3rd zone.

5. as each described wearing article in the claim 1 to 3, it is characterized in that in described first area and second area, there is not described core body.

6. as each described wearing article in the claim 1 to 5, it is characterized in that described goods comprise the saturating liquid lamella that faces wearer's body, deviate from the liquid-tight lamella of wearer's body and be plugged on described core body between these lamellas.